I keep seeing references to this society in older books and the last reference I can find is from a local village website about a branch in norfolk from 2005, is it still going? no information at all online

Yeah I just assumed the UK didn't have a society but It obviously did at some point... I messaged the Streptocarpus society to see if they can tell me what happened to it as I'm sure some of their members must have been members previously...